55747520 has 112 divisors (see below), whose sum is σ = 143195040. Its totient is φ = 20606976.

The previous prime is 55747519. The next prime is 55747529. The reversal of 55747520 is 2574755.

55747520 = T₄₂₃ + T₄₂₄ + ... + T₇₄₂.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55747529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322154 + ... + 322326.

Almost surely, 2^55747520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55747520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71597520).

55747520 is an abundant number, since it is smaller than the sum of its proper divisors (87447520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55747520 is a wasteful number, since it uses less digits than its factorization.

55747520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 55747520 is about 7466.4261866036. The cubic root of 55747520 is about 382.0103978238.

The spelling of 55747520 in words is "fifty-five million, seven hundred forty-seven thousand, five hundred twenty".